SOLVENT-EXTRACTION OF ER(III) AND LU(III) WITH 2-ETHYLHEXYLPHOSPHONIC ACID MONO-2-ETHYLHEXYL ESTER IN PRESENCE OF SOME REAGENTS

被引：4

作者：

REDDY, BV

REDDY, LK

REDDY, AS

REDDY, MLP

RAMAMOHAN, TR

DAMODARAN, AD

机构：

[1] SV UNIV,PG CTR,DEPT CHEM,CUDDAPAH 516004,INDIA

[2] CSIR,REG RES LAB,THIRUVANANTHAPURAM 695019,INDIA

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES | 1993年 / 172卷 / 01期

关键词：

D O I：

10.1007/BF02040673

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The extraction of Er(III) and Lu(III) from thiocyanate media with 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (EHEHPA) and also with mixtures of EHEHPA and thenoyltrifluoroacetone (HTTA) or tri-n-octylphosphine oxide (TOPO) or bis-2-ethylhexyl sulfoxide (B2EHSO) in benzene has been studied systematically. Synergistic effects have been observed with mixtures of EHEHPA + HTTA or TOPO. On the other hand, antagonistic effects have been observed with mixtures of EHEHPA + B2EHSO. These extraction data have been analyzed theoretically with the aid of a computer by taking into account complexation of the metal in the aqueous phase by SCN- and plausible complexation in the organic phase. The extraction constants of the various product species have been deduced by non-linear regression analysis. The stability constants for the thiocyanate complexes of the metal ions have also been determined.

引用

页码：167 / 179

页数：13

共 14 条

[11]

REDDY MLP, 1990, J RADIOANAL NUCL CHE, V114, P263

[12] CHEMICALLY BASED MODEL FOR THE EXTRACTION OF PR(III) AND ND(III) WITH MIXTURES OF VARIOUS ORGANOPHOSPHORUS COMPOUNDS [J].